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/*******************************************************************************
* Copyright (c) 2012 Florian Thienel and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Florian Thienel - initial API and implementation
*******************************************************************************/
package org.eclipse.vex.core.internal.dom;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import org.eclipse.vex.core.dom.ContentRange;
import org.eclipse.vex.core.dom.IContent;
import org.eclipse.vex.core.dom.INode;
import org.eclipse.vex.core.dom.IParent;
/**
* This class creates a deep copy of a single Node or the child nodes of a Parent within a given Range. The copy is made
* instantly when the constructor of DeepCopy is called.
* <p>
* DeepCopy means a full copy of all nodes, their children down to the leaf level and the associated content.
*
* @author Florian Thienel
*/
public class DeepCopy {
private final IContent content;
private final List<Node> nodes;
/**
* Creates a deep copy of the given node.
*
* @param node
* the node to copy
*/
public DeepCopy(final INode node) {
final int delta;
if (node.isAssociated()) {
final ContentRange range = node.getRange();
delta = -range.getStartOffset();
content = node.getContent().getContent(range);
} else {
delta = 0;
content = null;
}
nodes = new ArrayList<Node>();
copyNodes(Collections.singletonList(node), delta);
}
/**
* Creates a deep copy of the child nodes of the given parent within the given range.
*
* @param parent
* the parent
* @param range
* the range to copy
*/
public DeepCopy(final IParent parent, final ContentRange range) {
final int delta;
if (parent.isAssociated()) {
delta = -range.getStartOffset();
content = parent.getContent().getContent(range);
} else {
delta = 0;
content = null;
}
nodes = new ArrayList<Node>();
copyNodes(parent.children().in(range), delta);
}
private void copyNodes(final Iterable<? extends INode> sourceNodes, final int delta) {
final DeepCopyVisitor deepCopyVisitor = new DeepCopyVisitor(nodes, content, delta);
for (final INode sourceNode : sourceNodes) {
sourceNode.accept(deepCopyVisitor);
}
}
/**
* @return the copied nodes on the root level.
*/
public List<Node> getNodes() {
return nodes;
}
/**
* @return the copied content.
*/
public IContent getContent() {
return content;
}
}
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